Marley, FTR and with no real dog in this fight. I think that this is one of those things that the more you explain it, the more confusing it gets. Sadly, you don’t (shouldn’t have, at least) the option of just walking out of it as it then looks as you are hiding from it and/or conceding.
It is my opinion that if it is true that in the recent past all of Seven’s posts were “Recreational Complaining” (I haven’t checked myself), then yeah, he was being a jerk and he should have been suspended/banned for it. That’s all you need. All the bull about the sig, all individual examples are just hooks for the rules lawyers to pull you down into a losing discussion of what’s what.
This is where you (collective you) need to be a dick and just repeat the party line (“we decided he was being a jerk” or “we figured his contribution to the board was not worth the hassle of his whining” or whatever) without falling into details.
Less is more. In Moderation being laconic and one tracked is the winning ticket.
It might look like you are banning people “because we can”, but well, in the end and without it being an admission of mad power gone to the head, that is basically what it all boils down to.
The customer is always right. The administration has the right to refuse service. Two sides of the coin. We will bend over backwards to please you until we decide it is no longer in our interest to do so.
You run the risk of going overboard with it, of course, but that’s where the art of Moderation lies. In maintaining a healthy level of disturbance that keeps the place moving and interesting without either settling into oneness or getting muddied.
People are free to not like your chosen level of disturbance and go elsewhere, of course. This is where consistency helps (and where this place limps the worst, IMO). If you set one level, alienate a bunch and keep another, then changing that level will alienate the bunch you kept without guaranteeing the return of the ones that left before. Then you lose numbers.
Maybe all you need is a longer time frame to make decisions. When someone spots a potential problem, give the warning, gather the crew and discuss it. If it takes a week from offense to banning, then so be it. What can a person do in that week? He can gather no public outrage if he hasn’t been banned. Plus he has been warned that the council is in meeting. Then you can see if this knowledge spurs him to being more of a jerk or if he corrects course, giving you a gauge to his intentions and disposition.
Anyways, I am rambling now. Choose the two cents you want and keep the change too. Hah.